This computer a year ago died, for a graphic card failure, apparently. And then I spent some money to have it fixed, but it seems something is not yet working as it should.
The specifics are : NVIDIA GT 220 (2 gb) Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz (8 CPUs), ~3.4GHz 8 GB RAM. OS is Windows 7 Home edition 64 bit. It used to have a NVIDIA GTX 250 (1gb).
What happens is that occasionally it gives the OpenGL “lost connection” message. For NWN it means the game simply is shut down. Another consequence of it is the appearance of some dots here and there on the monitor, and relogging on NWN has some bigger dots around things, reddish somehow. The dots appear also in Firefox, even in "simple" pages as this, i.e. with no animation whatsoever.
I have tried most things suggested in several google-searched troubleshooting. Specifically, I've updated drivers, I've set the "causing" program (in this case NWN) to less fatiguing settings, I've used NVIDIA control panel to link the monitor to the GPU (PhysX) and to give to 3D settings more performance than quality. Of course I had already set Firefox not to use the hardware acceleration. By restarting the computer the issue seemed fixed, but in fact it showed itself again.
Any suggestion on what I could try to do alone?